Method of drawing glass cylinders.



H. Al SGHNELBAGE METHOD OF DRAWING GLASS CYLINDERS= APPLICATION FILED JULY 9, 1908;

939,101 Patented Nev. 2, 1909.

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vit known that I,- HARRY- A; SCHNEIJ- Y 1 Aon,a,1-es1dent of Methods 'of Drawing memen os-3e w e-e s; em-mes. 1

Crafton'fin the countyof \l leghe1 1y and State of Pennsylvania, have invented a neW andusefullnipi'ovenientiln 5 clear, andexact description thereof,

. clers,

cylinder in cylindrihal the manl'xfacture of manner orient "the countered is due to I the eylincleras itis f tion of the cylinder es higher temperatare than the upper portion certainty.

' lheobject of my invention is to utilize v the ,operatioii as toflobtain asnhstantiallyv umfarm cooling of the lhe cracking or breaking of the same, (hie 1'4;

v unequalcontraetion.'

In the accompanying drawingl have iiiu'sof apparatus suitable for invention relates to an ethodefilraw g'gl'ass manufacture. of window- Iiraw the blowwlniitting air to the'blow-pipe toretainithe (101' is (lraw'ncont to,

these eylinelers n this of the cylinder, and as a consequence there is an unequal, contraction materia l.f "1 his prevents tne drawing of the long lengths 'Withany degree of eyl i'nders to .waste heat given ofi by the molten glass and so distrilmte this heat in the elrawmg cylinder: and so prevent trated a formcarrying 'outgny invention in which i I Figure l is a sectional v proved apparatus; and Figi 211s across see tlon on the knell-2 Fig; l.

Referring to the clraWingsfile numeral 2- (lesigna'tes the pot or receptacle containing the molten glass,

necessary to. draw the length of cylinder olesired. Supported; above the receptacle 2 is the, box o chamber 8, said box being su'pported bythe frame Work 3. This box 3 maybe composed of the outer Walls tformed of metal of suitable thickness and with the V inner wall or lining 7 of asbestos or other suitable I material.

Glass Cylinders 5 and I (lo heteb)'*'declare the following to. be a full,- U s f-ris h 'ngedas at' 5t, .to the box. The

cylinders'such as empllo'yeci in com election-with the glass: Inthe lnanufactureiof these cylin-i has been customary tolower a ,bait'f, onthe end of a blowl-pipeyinto a noitea an ass of glass and then pipe withv the glass adhering thereto and forn'rnntil the eylin j the clesired length. In

drawn, the lower po'r-f being subjected t-o a in cooling which causes the cracking or-bs'eak ng of the cyhn do? which IQSUltSIH great loss. and Waste of 3o" elevation ofiny iin 'saidreceptaclc being of sniiicient sizeto contain the amount of glass ,the proper amount at suitable distance above the; cepta and the space left between the-bottom" said box and said receptacle. .permitsfo the l l l I ing operation, fully hereinaficr. set forth. 7 f One side of the-box forms adooifaml is c leseiljat the tooanii a ecoedingf iyj is or Ylfil il' with top plate 'whichis pr the proper the above apparatiis the-usual manner an i th n drawn upwardly; the attendant has full the glass. as it'rises fro 1 the reeept'aclezand f is thus ahietoteli whethei'the. glassfisztlrawling properly 01' not;

pers 11 the heatmay and regulated so as and maintain a substantially even tempera certain portion of the heat Will escape' through theopen spaceleft between thebottom ofthe box 3 and' the receptaele amount of heat escapi in this manner hemannerelso thegl'ass is permitted to set to enable the operator to control thethiehness and pi ovide a The gless thus becomes set-and is not maintained in a pIa-sticcondition' ing item the. molten body being; subject ,at this point,

I glass below, to the; atmospheric conditions the fan 16 and thereby of draft is'alwa'ys insured. The Waste heat given ofi by the ,molten glass in the receptacle 2 isthus utilized to maintaht the proper temperature Within the box 3 and the temperature is so controllecl that the upper end of the cylilv (her is maintained at substantially thesaeie heat as that gol'tion at, the lower end of the creased by the aid of nenitiiieson inmeemfoseeerron; enznitsirnirhnie: 4

inspection the cylindei (luring the Idaho;

it with theopeni'ngs' l0 controlled; byshifalil (i l2throiigl1 which 'thebl ow The box' 3, may be proeiiletif I With' the hood 114: with the extension I5 ex;

tending up therefrom" and in s'aiei' eieteirisienQ a snitablefitn' 16 m be located for Creating" In carryifigentniyimproeeiinethoiwith the bait ijsflowei'ed, in F the glass cylinder is As the cylinder rises opportunity to;,watch uniform thickness ofglass.

gjthe heatrie Y Y v a lspeeftfi catio n'ofietters v 1 Applicationfiledl'nlyh,1908. ser1a1fm;44 ,7g3l .t

so I As the. cylinder I drawn it extends up. within the hon-3 janl the. heat-given oft" fromv-the molten. glass"rises within the box? and by neans' oztitheda-m-v ture throughoutthboxor chiniber 3. A

ing controlledyby the ampers 11. In this k The draft whiehdraws the heat up thr0ugh".-tl1e chamber 3 may be in-" 85*: be properly "controlled f to give-the proper. heat J 0 ing of the cylinder due to un box 3 so that there is practically no liability of the unequal contraction when the cylinder cools. As soon as the cylinder has been drawn to the desired length the door 5 is 5 opened and the cylinder is removed and withdrawn from the box.

As lon as the heat is ascending from the molten g ass the atmos here will not enter the space below the box at a certain amount of the heat will be permitted to escape whereb the glass is cooledat that point and allowe to set to prevent undue stretching or elongating the same, while at the same time said open space permits of the operator inspecting the cylinder as it is drawn in order to determine whether it is being drawn properly and if not he can readily adjust the dalmpers 11 so as to produce the desired resu t.

20 In the above manner, by regulating and controlling the heat by, the dampers 11 any desired temperature may be maintained within the box'3 so as to keep the cylinder the cylinder to'any appreciable extent before the lower endof said cylinder within said box is cooled, whereby the cracking or breakequal contraction is obviated. What I claim is:

l 1. The method of drawing cylindrical glass articles, consisting in drawing the arti- 5 cle from a molten body of glass up through an inclosed space; creating a dr P 7 through said lnclosure, directing the heat and around thefrom the molten glass u cylinder during the drawing operation, and

maintaining an even heat or a substantially even heat around that ortionof said cylintion of said'cylinder above said molten body of glass to atmospheric temperature conditions, directing t e heat from. the 'molten glass up an around sa'ld cylinder during the drawing .op ration, and maintaining an even tion of sai cy inder Withili .$iiid inclose or a substalxtxiall even heat a'i'ound that porspace by con rolling'the draft;

3. The method of drawing cylindrical cle from a melt en body of glass up through an incloseds'pace, permitting a certain por-* -tion of heat alrising from said molten body a eat'a point below-the inclosed space, maintaining an even or a substantiallye en heat around that portion of the cylinddr closed space;

I In testimon whereof, I the said Haney A. SCHNELBAQH ave hereunto set In hand. HARRYA; .SGHNE BACH. Witnesses:

L. P. Fmrcxmean, Jr., P. Fnlcxmonli'. v

of glass to ontained within said in-.

55 glass articles; consisting in drawingthe arti- 

